tokevenGemini 3.1 Pro Custom Tools vs Gemini Robotics ER 2
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Gemini 3.1 Pro Custom Tools
Mid-tierGemini Robotics ER 2
Fast / BudgetQuality
Task confidence comparison
Guidance
When to use Gemini 3.1 Pro Custom Tools vs Gemini Robotics ER 2
Choose Gemini 3.1 Pro Custom Tools when...
- -You need a larger context window (1,048.576K vs 131.072K)
- Similar performance; consider provider preference or ecosystem fit.
Choose Gemini Robotics ER 2 when...
- -Cost matters: 50% cheaper on input tokens
At scale
Cost at scale
FAQ
When should I use Gemini 3.1 Pro Custom Tools instead of Gemini Robotics ER 2?
Gemini 3.1 Pro Custom Tools and Gemini Robotics ER 2 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini Robotics ER 2 cheaper than Gemini 3.1 Pro Custom Tools?
Yes. Gemini Robotics ER 2 input costs $1.00/MTok vs $2.00/MTok for Gemini 3.1 Pro Custom Tools, saving 50% on input.
What are the context window sizes for Gemini 3.1 Pro Custom Tools and Gemini Robotics ER 2?
Gemini 3.1 Pro Custom Tools has a 1,048.576K token context window. Gemini Robotics ER 2 has a 131.072K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Gemini 3.1 Pro Custom Tools pricing & benchmarks
$2.00 / $12.00 per MTok
Gemini 3.1 Pro Custom Tools cost calculator
All Gemini models
Gemini 3.1 Pro Custom Tools pricing history
Gemini Robotics ER 2 pricing & benchmarks
$1.00 / $5.00 per MTok
Gemini Robotics ER 2 cost calculator
All Gemini models
Gemini Robotics ER 2 pricing history
Other comparisons
How Gemini 3.1 Pro Custom Tools and Gemini Robotics ER 2 stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.